Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September denotes a minimal variation in the average high-temperature to a still mild 55.6°F (13.1°C) from August's 59.7°F (15.4°C). The nights of September anticipate a slight dip from daytime high temperatures, settling to an average low-temperature of 50.5°F (10.3°C).Humidity
In Long Island, the average relative humidity in September is 86%.Rainfall
In Long Island, in September, during 20.2 rainfall days, 7.24" (184mm) of precipitation is typically accumulated. In Long Island, during the entire year, the rain falls for 219.6 days and collects up to 79.29" (2014mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:41 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:27 pm AKDT.
Sunshine
The average sunshine in September is 6.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 3 during September translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September in Long Island?
How much does it rain in Long Island in September?
When it does not snow?
How many hours of daylight does Long Island have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Long Island, AK
- Average high temperature in September: 55.6°F
The warmest month (with the highest average high temperature) is August (59.7°F).
The month with the lowest average high temperature is December (38.1°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is February (33.3°F).
Average pressure in September
Long Island, AK
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.79"Hg).
Average wind speed in September
Long Island, AK
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Long Island, AK
- Average humidity in September: 86%
The month with the highest relative humidity is August (87%).
The month with the lowest relative humidity is March (80%).
Average rainfall in September
Long Island, AK
- Average rainfall in September: 7.24"
The wettest month (with the highest rainfall) is November (9.29").
The driest month (with the least rainfall) is May (2.91").
Average rainfall days in September
Long Island, AK
- Average rainfall days in September: 20.2 days
The month with the highest number of rainy days is October (21.4 days).
The month with the least rainy days is February (13.8 days).
Average snowfall in September
Long Island, AK
- Average snowfall in September: 0"
The month with the highest snowfall is March (10.94").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Long Island, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Long Island, AK
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in September: 6h and 3min
The month with the most sunshine is May (Average sunshine: 7h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Long Island, AK
- Average sunshine days in September: 9.1 days
The month with the most sunshine days is May (13.6 days).
The month with the least sunshine days is November (5.8 days).
Average UV index in September
Long Island, AK
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Long Island, AK
- Average cloud cover in September: 54
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are May and September (Cloud cover 54).
Average visibility in September
Long Island, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Long Island, Alaska, USA
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